﻿<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, minimum-scale=1, user-scalable=no">
    <meta name="description" content="Ambient Occlusion.">
    <meta name="cesium-sandcastle-labels" content="Showcases, Post Processing">
    <title>Cesium Demo</title>
    <script type="text/javascript" src="../Sandcastle-header.js"></script>
    <script type="text/javascript" src="../../../Build/CesiumUnminified/Cesium.js" nomodule></script>
    <script type="module" src="../load-cesium-es6.js"></script>
</head>
<body class="sandcastle-loading" data-sandcastle-bucket="bucket-requirejs.html">
<style>
    @import url(../templates/bucket.css);
</style>
<div id="cesiumContainer" class="fullSize"></div>
<div id="loadingOverlay"><h1>Loading...</h1></div>
<div id="toolbar">
<table><tbody>
    <tr>
        <td>Ambient Occlusion</td>
        <td><input type="checkbox" data-bind="checked: show"></td>
    </tr>
    <tr>
        <td>Ambient Occlusion Only</td>
        <td><input type="checkbox" data-bind="checked: ambientOcclusionOnly"></td>
    </tr>
    <tr>
        <td>Intensity</td>
        <td><input type="range" min="1" max="10" step="1" data-bind="value: intensity, valueUpdate: 'input'"></td>
    </tr>
    <tr>
        <td>Length Cap</td>
        <td><input type="range" min="0" max="1" step="0.01" data-bind="value: lengthCap, valueUpdate: 'input'"></td>
    </tr>
    <tr>
        <td>Step Size</td>
        <td><input type="range" min="1" max="10" step="0.01" data-bind="value: stepSize, valueUpdate: 'input'"></td>
    </tr>
    <tr>
        <td>Bias</td>
        <td><input type="range" min="0" max="1" step="0.01" data-bind="value: bias, valueUpdate: 'input'"></td>
    </tr>
    <tr>
        <td>Blur Step Size</td>
        <td><input type="range" min="0" max="4" step="0.01" data-bind="value: blurStepSize, valueUpdate: 'input'"></td>
    </tr>
</tbody></table>
</div>
<script id="cesium_sandcastle_script">
function startup(Cesium) {
    'use strict';
//Sandcastle_Begin
var viewer = new Cesium.Viewer('cesiumContainer');

if (!Cesium.PostProcessStageLibrary.isAmbientOcclusionSupported(viewer.scene)) {
    window.alert('This browser does not support the ambient occlusion post process.');
}

// Power Plant design model provided by Bentley Systems
var tileset = new Cesium.Cesium3DTileset({ url: Cesium.IonResource.fromAssetId(8564) });
tileset.readyPromise.then(function(tileset) {
    viewer.scene.primitives.add(tileset);
}).otherwise(function(error) {
    console.log(error);
});

var viewModel = {
    show : true,
    ambientOcclusionOnly : false,
    intensity : 3.0,
    bias : 0.1,
    lengthCap : 0.03,
    stepSize : 1.0,
    blurStepSize : 0.86
};

Cesium.knockout.track(viewModel);
var toolbar = document.getElementById('toolbar');
Cesium.knockout.applyBindings(viewModel, toolbar);
for (var name in viewModel) {
    if (viewModel.hasOwnProperty(name)) {
        Cesium.knockout.getObservable(viewModel, name).subscribe(updatePostProcess);
    }
}

function updatePostProcess() {
    var ambientOcclusion = viewer.scene.postProcessStages.ambientOcclusion;
    ambientOcclusion.enabled = Boolean(viewModel.show) || Boolean(viewModel.ambientOcclusionOnly);
    ambientOcclusion.uniforms.ambientOcclusionOnly = Boolean(viewModel.ambientOcclusionOnly);
    ambientOcclusion.uniforms.intensity = Number(viewModel.intensity);
    ambientOcclusion.uniforms.bias = Number(viewModel.bias);
    ambientOcclusion.uniforms.lengthCap = Number(viewModel.lengthCap);
    ambientOcclusion.uniforms.stepSize = Number(viewModel.stepSize);
    ambientOcclusion.uniforms.blurStepSize = Number(viewModel.blurStepSize);
}
updatePostProcess();

var camera = viewer.scene.camera;
camera.position = new Cesium.Cartesian3(1234127.2294710164, -5086011.666443127, 3633337.0413351045);
camera.direction = new Cesium.Cartesian3(-0.5310064396211631, -0.30299013818088416, -0.7913464078682514);
camera.right = new Cesium.Cartesian3(-0.8468592075426076, 0.1574051185945647, 0.507989282604011);
camera.up = Cesium.Cartesian3.cross(camera.right, camera.direction, new Cesium.Cartesian3());

//Sandcastle_End
Sandcastle.finishedLoading();
}
if (typeof Cesium !== 'undefined') {
    window.startupCalled = true;
    startup(Cesium);
}
</script>
</body>
</html>
